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Re: Concrete Piles w/ an R = 1.0!!
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 Subject: Re: Concrete Piles w/ an R = 1.0!!
 From: "SGE Structural" <sgordin(nospamat)sgeconsulting.com>
 Date: Fri, 24 Jul 2009 10:53:00 0700
Larry,
On top of this, by using the Table
12.21 G criterion for ordinary moment resistant concrete frames, your
system must be designed/detailed as such. By the same table, such systems
are not permitted in SDC C or higher (where, I presume, your project
is).
Assuming that the piles considerably
project above the ground, I would try to consider the columns as true
inverted pendulum structures (similarly to what Gerard is suggesting) per
ASCE Table 15.42, R=2. IMO, this will still be
conservative.
V. Steve Gordin, SE
Irvine CA

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